Microsoft Forms is an Office product with 130M monthly active users, recently we migrated our services to .NET 6, and we have seen 100%-200% increase in CPU efficiency.
Unfortunately ASP.NET Core doesn't support web forms (iirc), but if you have clean separation between backend and frontend, you could change frontend to mvc/razor pages/blazor.
ohooo dude you are fucked to put it simply maybe you can try avalonia ui for frontend or asp.net core mvc but it will be hard Good luck and keep updating us if you can